I have 2 of the Langdon carbs, his linkage, and his water manifold heat setup. It was basically a bolt on and use project. I wired both the chokes and they seem to work great. This is installed on a '62 261 with 848 head and Howard's cam in my '52 1/2 ton PU. I had one question before installation and Tom was very helpful.
Good luck with your project...it's worth it!
shoeless